INT 1A - Intel PCI BIOS v2.0c - FIND PCI DEVICE
        AX = B102h
        CX = device ID
        DX = vendor ID
        SI = device index (0-n)
Return: CF clear if successful
        CF set on error
        AH = status
            00h successful
                BL = bus number
                BH = device/function number (bits 7-3 device, bits 2-0 func)
            83h bad vendor ID
            86h device not found
        EAX, EBX, ECX, and EDX may be modified
        all other flags (except IF) may be modified
Notes:  this function may require up to 1024 byte of stack; it will not enable
          interrupts if they were disabled before making the call
        device ID FFFFh may be reserved as a wildcard in future implementations
        the meanings of BL and BH on return may be exchanged in future
          implementations
        all devices sharing a single vendor ID and device ID may be enumerated
          by incrementing SI from 0 until error 86h is returned
SeeAlso: AX=B182h

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